JP3678320B2 - Composite board - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a composite board useful as an energy-saving member for buildings and structures in which a bamboo chip is made into a board with an adhesive on the front and back surfaces in a sandwich structure.
[0002]
[Prior art]
There are many known boards of this type. For example, Japanese Patent Application Laid-Open No. 7-217055 proposes a board using bamboo materials in order to save resources and deplete wood resources.
[0003]
[Problems to be solved by the invention]
However, the board using bamboo chips has not been put into practical use, and the board formed simply by pressing has the disadvantages of lacking heat insulation, strength and fire resistance. Furthermore, the board has not taken any measures for water absorption and waterproofing.
[0004]
[Means for Solving the Problems]
In order to eliminate such drawbacks, the present invention integrates bamboo chips with an adhesive, interposes a fireproof sheet in the center, and also has a waterproof coating on one surface and a moisture-proof coating on the other surface. In addition, the core material is provided between the boards as a single unit, making it possible to achieve heat insulation, strength, waterproofing, windproofing, internal condensation prevention, prevention of destruction of the global environment, and effective use of resources at low cost. A composite board is provided.
[0005]
【Example】
Hereinafter, an embodiment of a composite board according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing a typical example of the board. The composite board A is a sandwich structure in which a core material 8 is integrally formed between an outer board 1 and an inner board 2.
[0006]
More specifically, as shown in FIG. 2, the outer board 1 and the inner board 2 are provided on one surface of the refractory sheet 3 or the bamboo chip 4 and the adhesive 5 that are integrally bonded and pressed to one surface or both surfaces thereof. It is composed of the coating 6 and the coating 7, and mainly functions as a reinforcing material, a waterproof material, a windproof material, and a fireproof material. Its thickness is about 3 to 10 mm and its density is about 50 to 500 kg / m ³ .
[0007]
The refractory sheet 3 is made of glass fiber, ceramic fiber, carbon fiber or the like in a mesh shape, a nonwoven fabric shape, or a sheet shape. Aluminum hydroxide powder (about 10 to 50 microns) and a phenol resin (resole type) are formed on at least one surface thereof. One or more of ammonium polyphosphate, graphite powder, and pearlite powder is added to this to form a sheet having a thickness of about 0.5 to 1 mm. This fireproof sheet 3 is useful for enhancing fire resistance and strength.
[0008]
Bamboo material chip 4 is formed by converting Munetake bamboo into a chip and integrating it with an adhesive 5, such as an epoxy resin, a phenol resin, a polyurethane resin, a polyester resin, a vinyl acetate resin, or a modified product thereof. Note that the bamboo chip 4 is obtained by cutting the bamboo scorpion bamboo into an arbitrary shape, having a thickness of about 0.1 to 2 mm, a size of an arbitrary area, and finally a layered structure. Moreover, in manufacture, it forms through high-humidity, a high-pressure press, or a high frequency, and a vapor | steam, and the insect-proof process was fully performed.
[0009]
The coating 6 is applied to and adhered to the surface of the outer board 1 and has mainly waterproof, windproof, and breathable functions. For example, a synthetic resin-based paint or film is applied integrally. , To stick. The film thickness is about 20 to 200 microns.
[0010]
The coating 7 is formed on the surface of the inner board 2 and has a moisture-proof property and a thickness of about 5 to 50 microns to prevent the occurrence of internal condensation. Materials include synthetic resin, paper coated with resin, and the like.
[0011]
The core material 8 is integrally interposed between the outer board 1 and the inner board 2, and is composed of, for example, plastic foam or one type of honeycomb as shown in FIG. 3 and has a thickness of about 30 to 200 mm. As such, it mainly functions as a heat insulating material, a raising material, and a reinforcing material.
[0012]
Examples of the plastic foam include polyurethane foam, polyisocyanurate foam, polystyrene foam, phenol foam, polyethylene foam, urea foam and the like, or graphite, calcium silicate, and aluminum hydroxide added, mixed, and unevenly distributed.
[0013]
The honeycomb is made of corrugated cardboard, aluminum, or plastic, and has improved soundproofing and further improved strength. In order to improve fireproofing and insectproofing properties, it is impregnated or coated with ammonium polyphosphate or a well-known insecticide.
[0014]
Next, a water absorption test (JIS-A-1414 (performance test method for building components (panels) and structural parts thereof)) was performed on the outer board 1 and the inner board 2 of the composite board A. At this time, the end surfaces of the outer board 1 and the inner board 2 are waterproofed. As a comparative example, the coating 6 and the coating 7 are not provided on the outer surfaces of the outer board 1 and the inner board 2 at all. As a result, the composite board A according to the present invention was 0 g / 100 cm ² , and the comparative example was 100 g / 100 cm ² or more, indicating no upper limit.
[0015]
Moreover, in the fireproof test (JIS-A-1301 (fireproof test method of the wooden part of the building)), the present invention passed, but the comparative example failed. In the present invention, the fireproof sheet 3 foamed 30 times to form a carbonized layer, which exhibited fireproof performance. In the present invention, the outer board 1 and the inner board 2 have a thickness of 10 mm, a density of 50 kg / m ³ , the binder is phenol resin, the core material 8 is corrugated cardboard (made of charcoal paper), and the height is 30 mm.
[0016]
[Other examples]
The above description is only one embodiment of the composite board A according to the present invention, and the core material 8 is formed smaller than the outer board 1 and the inner board 2 as shown in FIG. As shown in (b), a composite board A having a structure in which a connecting material 9 such as wood is interposed in the connecting portion can also be used.
[0017]
【The invention's effect】
As described above, according to the composite board according to the present invention, {circle over (1)} the wood resource depletion is used as a material, so that resources can be supplied over a long period of time at a low cost. (2) Insect damage and water absorption, which are weak points of bamboo, can be eliminated. (3) By using a composite board, heat insulation and strength can be added and construction can be prepared. (4) The internal condensation and waterproof performance can be greatly improved. (5) Fire resistance can be greatly enhanced. There are features and effects.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing a typical example of a composite board according to the present invention.
FIG. 2 is a partially cutaway perspective view showing one embodiment of an outer board and an inner board, which are the main parts of the composite board according to the present invention.
FIG. 3 is a perspective view showing an example of a core material of a composite board according to the present invention.
FIG. 4 is an explanatory view showing an embodiment in which a heat insulating structure is formed using the composite board according to the present invention.
[Explanation of symbols]
A Composite board 1 Outer board 2 Inner board 3 Fireproof sheet 4 Bamboo chip 5 Adhesive 6 Coating 7 Coating 8 Core material 9 Connecting material

Claims (1)

In the composite board in which the board is integrally bonded to both sides of the core, the bamboo chip is integrally formed on at least one side of the fireproof sheet via an adhesive, and the outer surface is provided with a waterproof and windproof coating A composite board comprising: a board and an inner board provided with a moisture-proof coating on the outer surface instead of the coating of the outer board.

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